Lock-nut



(No'ModeL) F. MAXWELL.

- V LOOK NUT. .No; 289,430. Patented Dec. 4, 18'83.

ATENT @FFICE.

FRANK MAXWELL, OF CEDAR VALE, KANSAS.

LOCK-NUT.

SPECIFICATION forming part of Letters Patent No. 289,430, dated December 4, 1883,

Application filed June 5, 1888.

To all whom it may concern.-

Be it known that I, FRANK MAXWELL, a citi zen of the United States, residing at Cedar Vale, in the county of Chautauqua and State of Kansas, have invented a new and useful Improvement in LocloNuts, which I believe has object I obtain by cutting a slot or groove across the face of the nut and driving a steel key in, so as to cut or impinge on the thread of the bolt and look or prevent the nut from turning and unscrewing.

Figure 1 is a face view of the nut A, with an (No model.)

undercut or dovetailed slot or groove across the face, cutting the thread. The slot is marked B. Fig. 2 is the steel key, slightly beveled, so as to be wider at the bottom or inside.

The key is marked 0.

Manner of operating: Drive the key marke G into the slot or groove marked B, cutting or impinging the thread of the bolt, and thereby locking the nut.

I claim as my invention- Incombination with the nut A, having an undercut groove across its face and intersecting the thread, and with a suitable threaded bolt, the key 0, inserted in the groove and impinging the thread of the'bolt, substantially as described, and for the purpose set forth.

FRANK MAXWELL.

Witnesses:

E. H. MARsH, ARNOLD WATERS. 

